Eternal vigilance is the price of liberty — power is ever stealing from the many to the few…. The hand entrusted with power becomes … the necessary enemy of the people. Only by continual oversight can the democrat in office be prevented from hardening into a despot: only by unintermitted Agitation can a people be kept sufficiently awake to principle not to let liberty be smothered in material prosperity.

Speech in Boston, Massachusetts (28 January 1852), Speeches Before the Massachusetts Anti-Slavery Society (1853), p. 13. The memorable and oft-quoted phrase, "eternal vigilance is the price of liberty," was not in quotation marks in the printed edition of this speech. The Home Book of Quotations, ed. Burton Stevenson, 9th ed., p. 1106 (1964), notes that "It has been said that Mr. Phillips was quoting Thomas Jefferson, but in a letter dated 14 April, 1879, Mr. Phillips wrote: '"Eternal vigilance is the price of liberty" has been attributed to Jefferson, but no one has yet found it in his works or elsewhere.' It has also been attributed to Patrick Henry."

Corruption does not so much rot the masses: it poisons Congress. Credit-Mobilier and money rings are not housed under thatched roofs: they flaunt at the Capitol. As usual in chemistry, the scum floats uppermost.

The agitator must stand outside of organizations, with no bread to earn, no candidate to elect, no party to save, no object but truth — to tear a question open and riddle it with light.

Mister Toombs was willing to dissolve the Union to save slavery, Mister Phillips, to save liberty; while Mister Seward, denounced and derided by both, declared that the deepest instinct of the American people was for union. Reserved rights. State rights, limited powers, the advantages of union and disunion, were the cucumbers from which we were busily engaged in distilling light, overlooking the fact of nationality in discussing the conditions of union. We were speculating upon costume. We gravely proved that the clothes were the clothes of a woman, or of a child, without seeing that whatever the clothes might be there was a full-grown man inside of them. "The Constitution is a contract between sovereign States", shouted Mister Toombs, "let Georgia tear it and separate". "The Constitution is a league with hell", calmly replied Mister Phillips, "let New York cut off New Orleans to rot alone". "Oh, dear! it"s a dreadful dilemma", whimpered President Buchanan. "States have no right to secede, and the United States have no right to coerce. Oh, dear me! it"s perfectly awful! I"m the most patriotic of men, but what shall I do? what shall I do?" Separate! Cut off! Secede! It was of a living body they spoke, which, pierced anywhere, quivered everywhere.

The good Lord had had a chance for a long time before the abolition. I believe that there is a moral government; and that God reigns. I am no pessimist; I give thanks to the good Lord, and also to the good men through whom He has worked. Prominent among them was Garrison, and scarcely less so was Phillips...